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WorksheetsHEAT
Total questions: 30
Worksheet time: 1hrs 22mins
Name
Class
Date
1.
A blister on the skin caused by steam is more painful than blister caused by boiling water because
a)
steam has a higher temperature
b)
steam has high specific latent heat of vaporisation
c)
steam takes longer time to lose heat
d)
steam has high specific heat capacity
2.
Calculate the amount of heat required to convert 1g of water at 30oC to steam at 100oC.
[Specific heat capacity of water = 4200 Jkg-1oC-1
Specific latent heat of vaporization of water = 2.26 X 106 J kg-1]
[Specific heat capacity of water = 4200 Jkg-1oC-1
Specific latent heat of vaporization of water = 2.26 X 106 J kg-1]
a)
294 J
b)
1441 J
c)
2260 J
d)
2554 J
3.
Two objects A and B are in contact as shown below.
When thermal equilibrium is reached,
When thermal equilibrium is reached,
a)
the specific heat capacity of A and B are equal
b)
the latent heat of A and B are equal
c)
the temperatures of A and B are equal
4.
Which graph does not illustrate Boyle’s Law ?
a)
A
b)
B
c)
C
d)
D
5.
Which of the following is the fixed variable in a Charles’ Law experiment?
a)
Temperature
b)
Volume
c)
Pressure
6.
Diagram shows a gas molecules inside a cylinder. The piston is moved slowly downwards and the temperature of the gas stays the same.
Why does the pressure of the gas increase?
Why does the pressure of the gas increase?
a)
The molecules collide harder with the walls
b)
The molecules collide more often with the walls
c)
The molecules move more quickly
d)
The number of molecules increases
7.
Why the bubbles become larger as the bubbles rise to the surface of water ?.
a)
Atmospheric pressure on the bubbles decreases
b)
Atmospheric pressure on the bubbles increases
c)
Water pressure on the bubbles decreases
d)
Water pressure on the bubbles increases
8.
Which of the following liquids A, B, C or D, can be used to make a liquid-in-glass thermometer to measure temperatures from -50 °C to 50 °C
a)
A
b)
B
c)
C
d)
D
9.
Diagram 12 shows two copper blocks L and M, in contact with each other. The initial temperatures of L and M are 50 °C and 30 °C respectively.
Which statement is correct when L and M are at thermal equilibrium?
Which statement is correct when L and M are at thermal equilibrium?
a)
Temperature of L is higher than M
b)
The quantity of heat in L is the same as in M
c)
Rate of change in temperature of L is bigger than that of M
d)
Net rate of heat flow between L and M is zero
10.
The specific heat capacity of aluminium is higher than copper. When heat is supplied at the same rate to two identical blocks same mass, which of the following happens?
a)
the copper block will get heated up faster
b)
the copper block will expand faster than aluminium
c)
the aluminium block will expand faster than copper block
d)
the rate of temperature rise in the aluminium block is higher
11.
Diagram shows temperature against time graph of a substance. The substance is heated at a steady rate. lt changes from solid to a liquid and then to gas.
Which parts of the graph show a state with solid and liquid only?
Which parts of the graph show a state with solid and liquid only?
a)
A
b)
B
c)
C
d)
D
12.
Mercury is used in the liquid-in-glass thermometer because it
a)
sticks to the glass wall
b)
has a lower boiling point
c)
expands and contract uniformly
d)
is transparent and therefore it is easier to read
13.
Diagram shows the temperature againts time graph for 600 g of Iiquid X that is heated by a 100 W electric immersion heater.
Determine the specific heat capacity of liquid X in Jkg-1oC.
Determine the specific heat capacity of liquid X in Jkg-1oC.
a)
20
b)
60
c)
1200
d)
2000
14.
Diagram shows a few hot steam dumplings cooked using a steamer.
The dumplings are cooked using the concept of
The dumplings are cooked using the concept of
a)
thermal equilibrium
b)
heat capacity
c)
latent heat
15.
The graph shows the heating curve of a 500 g liquid P by a 60 W immersion heater. The specific heat capacity of the liquid P is
a)
220 J kg-1oC-1
b)
720 J kg-1oC-1
c)
1260 J kg-1oC-1
d)
1680 J kg-1oC-1
16.
The latent heat of fusion of a substance is the quantity of heat required to
a)
separate the molecules in the solid substance so that they are able to move further.
b)
increase the kinetic energy of the molecules in the solid substance
c)
increase the temperature of the substance
17.
The air pressure in a car tyre increases after the car has travelled a long distance because
a)
the average velocity of the air molecules in the tyre has decrease.
b)
the temperature of the air in the tyre has increased.
c)
the size of the air molecules in the tyre has increased.
18.
Which diagram shows correctly the air pressure inside an empty bottle?
a)
A
b)
B
c)
C
d)
D
19.
A liquid to be used as a cooling agent in the cooling system of a machine should have a
a)
high specific heat capacity
b)
Low boiling point
c)
high density
20.
A fixed mass of gas in a cylinder is compressed slowly.
Which statement is correct?
Which statement is correct?
a)
The pressure of the gas is constant
b)
The molecules of the gas move further apart
c)
The average kinetic energy of the gas molecules increases
d)
The molecules of the gas collide more frequently with the walls of the cylinder
21.
An experiment is carried out to investigate the change of volume with temperature for a fixed mass of gas.
Which of the following graphs shows the correct relationship between volume and temperature?
Which of the following graphs shows the correct relationship between volume and temperature?
a)
A
b)
B
c)
C
d)
D
22.
Diagram shows temperature – time graph of a liquid . The liquid is heated by using a heater of 0.4 kW. The mass of the liquid is 0.4 kg.
What is the specific heat capacity of the liquid?
What is the specific heat capacity of the liquid?
a)
0.50 J kg -1 oC-1
b)
50 J kg -1 oC-1
c)
500 J kg -1 oC-1
d)
5000 J kg -1 oC-1
23.
The meniscus of the mercury reaches point X at 0 °C and point Z at 100 °C.
Temperature below the ice-point is at …
Temperature below the ice-point is at …
a)
W
b)
X
c)
Y
d)
Z
24.
Diagram shows cold milk being poured into hot coffee.
Which statement is correct about the final temperature of the mixture?
Which statement is correct about the final temperature of the mixture?
a)
It is lower than the temperature of the cold milk
b)
It is lower than the temperature of the hot coffee
c)
It is higher than the temperature of the hot coffee
d)
It is the same as the temperature of the cold milk
25.
Diagram shows the cooling curve of a substance. Which phase shows heat is absorbed?
a)
QR
b)
PQ and RS
c)
QR and RS
d)
PQ, QR and RS
26.
A balloon of volume 3000cm3 contains air at a pressure of 76 cm Hg. What would be the volume of the balloon if the pressure is increased to 80 cm Hg?
a)
2850 cm3
b)
3000 cm 3
c)
1850 cm3
d)
2500 cm3
27.
A motorcyclist fills his tyres with air at 2.7 atm during winter. The temperature is -3oC. What is the air pressure when the temperature is 27oC?
a)
3.0 atm
b)
3.5 atm
c)
4.0 atm
d)
4.5 atm
28.
A balloon filled with 5000 cm3 of air at 30oC, is put in a refrigerator at 4oC. Find the new volume of the balloon.
a)
4000 cm3
b)
4500 cm3
c)
4571 cm3
d)
5000 cm3
29.
Figure shows a balloon in air-sealed cylinder. When the piston is pushed upward to level Q, the volume of the balloon increases.
a)
Pressure Law
b)
Charles' Law
c)
Boyle's Law
30.
Figure shows the apparatus that is used to verify pressure law. What is the purpose of maintaining the level of mercury at P throughout the experiment?
a)
so that the difference of mercury level at P and Q is easily recorded.
b)
so that the pressure of the gas remains unchanged.
c)
so that the temperature of the water does not change the temperature of the gas in the flask.
d)
so that the volume of the gas remains constant.
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